TAN-16 Datasheet PDF

TAN-16 How to Generate a 1.544MHz (or 2.048MHz) Clock Signal from an 8kHz Reference Clock July 1998-2 The XRT8000 device can be configured to generate either a T1 (1.544MHz) or E1 (2.048MHz) rate clock signal, from a “Reference Clock signal of frequency 8kHz. The approach that one should use to accomplish all of this is presented below. 1. To generate a 1.544MHz clock signal, from an 8kHz clock signal: XR-T8000 8 kHz F IN CLK1 1.544 MHz CLK2 1.544 MHz MSB (CONFIG.) Microcontroller Serial Interface Figure 1. Illustration of the XRT8000 device generating a 1.544MHz clock signal from an 8kHz Reference clock signal (Reverse/Slave Mode). In order to configure the XRT8000 device to operate in this manner, the user must configure the chip to operate in the “Reverse/Slave” Mode. The user accomplishes this by executing the following steps: * Pull the MSB pin (pin 8) “low”. This will configure the device to operate in the “Slave” Mode. * Write the following values, into the corresponding “Configuration Registers”, (via the Microprocessor Serial Interface) as tabulated below in Table 1.